The dragon crosses the seaside Guangzhan high -speed rail Zhanjiang Bay Underwater Tunnel shield machine to overcome the biggest difficulty

Yangcheng Evening News reporters Yuan Zengwei and Li Zhiwen, correspondent Zhang Pengfei, Hu Anjiang, Zhang Pengfei Photography report: At 10 o'clock on September 13, the "Yongxing" shield machine "Yongxing" shield machine in Zhanjiang Bay tunnel of the Guangzhan high -speed rail passed through the main channel of Zhanjiang Bay. The main channel of the bay did not have any impact, marking that the Zhanjiang Bay Underwater Tunnel successfully overcome new technical difficulties and achieved breakthrough progress.

Construction vehicle operation in tunnel operations

The Guangzhan High -speed Railway Zhanjiang Bay Oceanic Tunnel is invested and constructed by the Guangdong Guangzhan Railway Company. China Railway has a general contract for EPC EPC, and China Railway 14th Bureau Group.

Zhanjiang Bay Oceanic Tunnel is a full -length control project with a single hole and double line. Among them, the shield section is 7551 meters, the shield excavation diameter is 14.33 meters, and the outer diameter of the tube is 13.8 meters. Shield tunnel.

"Zhanjiang Bay's main channel is a first -level risk source in the Zhanjiang Bay Underwater Tunnel Project. It is also the deepest part of the crossing. It is very strict for shield machine operations, parameter control, and equipment performance. According to the manager Wang Hao, the water pressure under the main channel of Zhanjiang Bay is greater, and the shield machine is facing a huge test at the lowest point of the minimum at the bottom of the sea. At the same time, with the extension of the mileage, the material transportation, knife wear replacement, mud tube explosion -proof, shield tail sealing safety, long -range ventilation, long -range ventilation, and long -range ventilation are cracked under ultra -long -distance excavation conditions.

It is understood that the main channel of the Zhanjiang Bay Underwater Tunnel this time is 195 meters long. It is the most important maritime transportation line in Zhanjiang Bay Sea. The size of the coverage is under pressure, and the construction difficulty and risk are high.

At present, the "Yongxing" shield machine has been excavated in a total of 2770 meters in a total of 2,770 meters, the assembly has completed the 1385 ring, entering the section of over 1,300 meters, and the deepest part of Zhanjiang Bay. It is expected that the overall excavation construction task of the sea section will be completed by the end of the year.

Careful operation of the construction staff of Zhanjiang Bay Sea Underwater Tunnel

The total length of the Guangzhan high -speed rail is about 401 kilometers. The line starts at the Guangzhou Railway Station. It passes through Foshan, Zhaoqing, Yunfu, Yangjiang, Maoming, Zhanjiang and other cities. 100 million yuan, designing driving speed of 350 kilometers, is the longest high -speed rail project in Guangdong Province and the largest investment.

After the Guangzhan high -speed rail is opened to traffic, it will achieve 90 minutes from the central urban area of ​​Guangzhou to Zhanjiang, which will help enhance the regional economic status of western Guangdong and promote the overall economic and social development of Zhanjiang. Play an important leading role in strengthening the development of Guangdong's foreign cooperation in the development of "land and abroad, and two -way mutual benefit of east -west and west". The layout has important promotion.

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